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TINLEY PARK, IL - FEBRUARY 27: Green tipped armor-piercing 5.56 millimeter bullets and conventional copper-jacketed lead 5.56 bullets are offered for sale at Freddie Bear Sports on February 27, 2015 in Tinley Park, Illinois. The Obama administration has proposed banning the green tipped ammunition, which is popular among hunters and target shooters, because it can be used in pistols. Fear of a ban has caused a run on sales. (Photo Illustration by Scott Olson/Getty Images)